The solution is fairly simple but not necessarily obvious, the center of
gravity may be lowered by hanging lead weights under the table.
 
>Dear list,
>   We have a BioRad MRC1000 with a motorized pillar to
>permit its use with standard or inverted microscopes. It is
>currently attached to a Zeiss Axiovert 100, and is also
>surrounded by an aluminum bridge to support manipulators
>and other equipment weighing about 30 pounds. The 3'x4'
>isolation table on which it is now mounted is in bad
>condition and we plan to replace it. We would like to
>attain sufficient stability for patch clamping on the
>microscope stage, as well as imaging at high magnification,
>and would appreciate hearing from anyone with experience
>on this matter. We understand that the high center of
>gravity of the equipment stresses the capabilities of
>standard vibration isolation equipment.
>Thanks,
>Len ZablowLeonard Zablow
>Howard Hughes Medical Institute
>722 West 168 St.
>New York, N.Y. 10032
>
>Tel:(212)960-2246
>Fax:(212)795-7997
>
>